Published in Astronomy Reports
In the course of monitoring interplanetary scintillations of a large number of sources using the Big Scanning Antenna of the Lebedev Physical Institute, a search for pulsars with periods ≥0.4 s at declinations −9◦
Published in Mathematical Notes
Published in Computational Mathematics and Mathematical Physics
AbstractThis paper is devoted to the development and application of the Fourier method to the numerical solution of Ito stochastic differential equations. Fourier series are widely used in various fields of applied mathematics and physics. However, the method of Fourier series as applied to the numerical solution of stochastic differential equation...
Published in Astronomy Reports
AbstractDuring five years of daily observations, the search for new pulsars using the BSA LPI radio telescope in 96 spatial beams covering 17 000 square degrees was conducted. Five new pulsars were identified. Candidate pulsars were selected in summed power spectra. A noise generator was used to renormalize data and total the power spectra for indi...
Published in Automation and Remote Control
The paper was devoted to developing numerical methods with the orders 1.5 and 2.0 of strong convergence for the multidimensional dynamic systems under random perturbations obeying stochastic differential Ito equations. Under the assumption of a special mean-square convergence criterion, attention was paid to the methods of numerical modeling of the...
Published in Bulletin of the Lebedev Physics Institute
Radio emission of the gamma pulsar J0357+3205 is searched in the meter wavelength range. Periodic radiation is found in one of the 1700 observation sessions performed. The average pulsar profile is single-component with a half-width of 20–25 ms. The pulsar flux density estimate is 14 mJy.
Published in Astronomy Reports
AbstractThe search for pulsar (periodic) radiation of five gamma-ray pulsars was carried out using the summed power spectra and summed periodograms. No harmonics corresponding to the known periods of the pulsars were found. An upper estimate was obtained for the integral flux density of pulsars J0357+3205 (
Published in Functional Analysis and Its Applications
We prove that the connected sum of two links is quasipositive if and only if each summand is quasipositive. The proof is based on the filling disk technique.
Published in Astronomy Reports
AbstractA survey of the northern hemisphere at the frequency 111 MHz is carried out. The total accumulation time for each point of the survey area was at least one hour. When searching for dispersed pulses, we detected 75 sources of pulsed radiation. More than 80% of these sources are known pulsars seen in the antenna side lobes. In twelve known pu...
Published in Computational Mathematics and Mathematical Physics
AbstractThis paper is devoted to the comparative analysis of the efficiency of using the Legendre polynomials and trigonometric functions for the numerical solution of Ito stochastic differential equations under the method of approximating multiple Ito and Stratonovich stochastic integrals based on generalized multiple Fourier series. Using the mul...
